module.exports = ! function () {
  function n(n, e, t) {
    return n.getAttribute(e) || t
  }

  function e(n) {
    return document.getElementsByTagName(n)
  }

  function t() {
    var t = e("script"),
      o = t.length,
      i = t[o - 1];
    return {
      l: o,
      z: n(i, "zIndex", -1),
      o: n(i, "opacity", .5),
      c: n(i, "color", "0,0,0"),
      n: n(i, "count", 99)
    }
  }

  function o() {
    a = m.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth, c = m.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight
  }

  function i() {
    r.clearRect(0, 0, a, c);
    var n, e, t, o, m, l;
    s.forEach(function (i, x) {
      for (i.x += i.xa, i.y += i.ya, i.xa *= i.x > a || i.x < 0 ? -1 : 1, i.ya *= i.y > c || i.y < 0 ? -1 : 1, r.fillRect(i.x - .5, i.y - .5, 1, 1), e = x + 1; e < u.length; e++) n = u[e], null !== n.x && null !== n.y && (o = i.x - n.x, m = i.y - n.y, l = o * o + m * m, l < n.max && (n === y && l >= n.max / 2 && (i.x -= .03 * o, i.y -= .03 * m), t = (n.max - l) / n.max, r.beginPath(), r.lineWidth = t / 2, r.strokeStyle = "rgba(" + d.c + "," + (t + .2) + ")", r.moveTo(i.x, i.y), r.lineTo(n.x, n.y), r.stroke()))
    }), x(i)
  }
  var a, c, u, m = document.createElement("canvas"),
    d = t(),
    l = "c_n" + d.l,
    r = m.getContext("2d"),
    x = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (n) {
      window.setTimeout(n, 1e3 / 45)
    },
    w = Math.random,
    y = {
      x: null,
      y: null,
      max: 2e4
    };
  m.id = l, m.style.cssText = "position:fixed;top:0;left:0;z-index:" + d.z + ";opacity:" + d.o, e("body")[0].appendChild(m), o(), window.onresize = o, window.onmousemove = function (n) {
    n = n || window.event, y.x = n.clientX, y.y = n.clientY
  }, window.onmouseout = function () {
    y.x = null, y.y = null
  };
  for (var s = [], f = 0; d.n > f; f++) {
    var h = w() * a,
      g = w() * c,
      v = 2 * w() - 1,
      p = 2 * w() - 1;
    s.push({
      x: h,
      y: g,
      xa: v,
      ya: p,
      max: 6e3
    })
  }
  u = s.concat([y]), setTimeout(function () {
    i()
  }, 100)
}();

//鼠标点击出现爱心特效
module.exports = (function (window, document, undefined) {
  var hearts = [];
  window.requestAnimationFrame = (function () {
    return window.requestAnimationFrame ||
      window.webkitRequestAnimationFrame ||
      window.mozRequestAnimationFrame ||
      window.oRequestAnimationFrame ||
      window.msRequestAnimationFrame ||
      function (callback) {
        setTimeout(callback, 1000 / 60);
      }
  })();
  init();

  function init() {
    css(".heart{width: 10px;height: 10px;position: fixed;background: #f00;transform: rotate(45deg);-webkit-transform: rotate(45deg);-moz-transform: rotate(45deg);}.heart:after,.heart:before{content: '';width: inherit;height: inherit;background: inherit;border-radius: 50%;-webkit-border-radius: 50%;-moz-border-radius: 50%;position: absolute;}.heart:after{top: -5px;}.heart:before{left: -5px;}");
    attachEvent();
    gameloop();
  }

  function gameloop() {
    for (var i = 0; i < hearts.length; i++) {
      if (hearts[i].alpha <= 0) {
        document.body.removeChild(hearts[i].el);
        hearts.splice(i, 1);
        continue;
      }
      hearts[i].y--;
      hearts[i].scale += 0.004;
      hearts[i].alpha -= 0.013;
      hearts[i].el.style.cssText = "left:" + hearts[i].x + "px;top:" + hearts[i].y + "px;opacity:" + hearts[i].alpha + ";transform:scale(" + hearts[i].scale + "," + hearts[i].scale + ") rotate(45deg);background:" + hearts[i].color;
    }
    requestAnimationFrame(gameloop);
  }

  function attachEvent() {
    var old = typeof window.οnclick === "function" && window.onclick;
    window.onclick = function (event) {
      old && old();
      createHeart(event);
    }
  }

  function createHeart(event) {
    var d = document.createElement("div");
    d.className = "heart";
    hearts.push({
      el: d,
      x: event.clientX - 5,
      y: event.clientY - 5,
      scale: 1,
      alpha: 1,
      color: randomColor()
    });
    document.body.appendChild(d);
  }

  function css(css) {
    var style = document.createElement("style");
    style.type = "text/css";
    try {
      style.appendChild(document.createTextNode(css));
    } catch (ex) {
      style.styleSheet.cssText = css;
    }
    document.getElementsByTagName('head')[0].appendChild(style);
  }

  function randomColor() {
    return "rgb(" + (~~(Math.random() * 255)) + "," + (~~(Math.random() * 255)) + "," + (~~(Math.random() * 255)) + ")";
  }
})(window, document);
